Device for adjusting the tension of springs.



EEST AVAILABLE CGP ENTENIED NOV. 15,1904,

E. S. EUCKNANI'. DEVICE IoE ADJUSIING THE TENSION 0E SPRINGS.

APPLICATION FILED MAR.31.1904.

N0 MODEL.

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iiNet brace.

" NiTED 'STATES LPATENT OFFICE@ '.k Patented Noveihber 14.5, 1

ZRA S. BUOKNAM, OF LLANERCH, PENNSYLVANIA, ASSIGNOR TO JOHN A. BRILL, OF PHILADELPHIA, PENNSYLVANIA.

DEVICEYFOR ADJUSTING THE TENSION F lSFFHNGS.

SPECIFICATION forming part of Letters Patent No. 774,931, dated November 15, 1904-.

Application led March 3l, 1904.

To all whom it may concern:

Be it known that I. EZRA S. BUGKNAM, a resident of Llanerch, State oi' Pennsylvania, have invented certain new and useful Improvements in Devices for Adjusting the Tension ofV Springs in Curtain-Rollers or the Like, of which the following is a specification.

The object of my invention is to produce a simple means for adjusting the tension of springs in curtain-rollers or other similar articles, so that the tension may be made uniform in as many rollers as desired. This is especially desirable in curtain-rollers in cars where a number of curtains are employed, so that the springs in the various rollers may be adjusted to a uniform tension, and my device is also adapted to establish certain 'units'oi' tension. I

Further objects of my invention and details of construction will be hereinafter set forth, and further pointed out in the claims.

In the drawings'forming partofthis speciication, in which similar numerals of reference indicate corresponding parts throughout the several views, Figure l villustrates the method of using my invention to adjusta curtain-roller spring with the aid of an ordinary Fig. 2 is a side elevation of my improved adjuster. Fig. 3 is an end view of Fig. 2 looking in the direction of the arrows. Fig. 4 is a longitudinal section, taken on the line 4 4 of Fig. 3, looking in the direction of the arrows. Fig. 5 is a cross-section, taken on the line 5 5 of Fig. f1, looking in the direction of the arrows. Fig. 6`isa cross-section on the line 6 6 of Fig. 4- looking in the4 direction of the arrows. Fig. 7 is a side elevation of a portion of one of the parts. Fig.=8 is a cross-section on the line 8 8 of Fig. A looking in the direction of the arrows. i Fig. 9 is a section on the-line 9 9 of Fig. 7. Fig. 1() is a partial sectional view of the casing and spindle, and Fig. ll isa cross-section through the i cap.

seriai No, 200,906. (no model.)

sion, so that a number of spring-rollers may be adjusted tothe same tension; and it consists oi a casing l, 1n which is inclosed a coil-spring 2. One end oi' the spring is adapted to engage a revolving cap and the other adapted to oi' the spring threads 6 to receive the threads 4 on the spindle when the-latter is screwed into placegand -through the casing is a small set-screw ,7, which holds the spindle when the latteiis int position. Theinner end of the spindle ifspro vided With a' bore having interior screwthreads 8 to receive the screw 9, the purpose of which will appear later.

A secondaryl part oi' the casing is a ey md'r 10, one end, 11, of which revolyes wir!"l ne casing 1, the end abutting' gallsl the S der 12 oi' kthe casing, and 'lS PIOVded V,

thecasing and is preferably of suiiici tension to lie Hush with the outer sur the Casing, v This flange is provided ith marks or figures 15, adapted to registe Y lh.

an indicated point, such as the arrow f16-on" 8 the `casing, so that it can be seen howmany revolutions or fractions thereoi` are madeby the' spindle as against the tension of the coil'- 17, having an aperture 18 therethroughv to ree ture 19 to-'receive the end 2O of the spring-,f

l flangel, which abuts against the endlltofspring. Within the cylinder is a cross-'piece'l ther opposite end 21 of the spring beii'igfre-` ceived by an aperture 22 in the rearoifthe' spindle. A By the means above describedthe casing 1 and cylinder l0 are held together means'of the screw 9, so that thel cylinder y revolve within the casing, and when revolved the spindle engaging one end'of thelsprfing and the cross-piece of the cylinder enga" the other end causes a torsgu'al strainofl L coil-spring, which coact.c Wlh the Dim escription in in the cap to pass in the opening `e yl of such thickness as to it over the end ie cylinder and lie iiish with the flange ive symmetry to the device. The end he Acap is provided with a rectangular U 28 (see Fig. 3) to receive the rectani suoli it be) end of the spring curtain- 'Ihe cylinder and cap may be made in gral piece, if desired; but I prefer to t as illustrated, so that the cap may be `operation of my improved adjusting is illustrated in Fig. 1, in which the in an ordinary curtain-roller (the mechioi' which'is so well known that details t be shown here) is adjusted by means When the parts ,are in the position n this ligure, the brace is turned, thus 'i' ng the spindle, which exerts a torsional M n the coil-springwhich in turn exerts olving stress on the cylinder and cap, Vus to the spring in the curtain-roller, sion of the spring in the adjuster co- -rod. When the spring is being adnotice is taken of the number of revoor parts of revolutions made by the r and Casing in Oppositie dlrectlons f the dial 15, so that other curtainngs mav be adjusted to the same tenda record made of the unit of tension, e ,f 'il e I have described in detail my specific 0I' Carry 111g Out my invention, I do not be understood as limiting the Scope of L d claims herein, as details of construce y be altered without departing from re of my invention. ng described my invention, what I a device for tightening springs, the .i ation ot a coil-spring, means on one he spring for engaging' with the springtihg means on a curtain-roller, r simiidevice, means on the other end of the or applying a torsional twist thereto,

ot' the ends of the spring.

a device for tightening springs, the tion oi a coil-spring, means on one ng means on `a curtain-roller or simi- "Y or tulil-g the same, and means adaptdicate the rtlative revolutions of the ls o tl e with the tension of the spring in the.

ns for determining the relative revof me. means on the other end of the' the outer end oi the cylinder attach a Blby means of a bayonet connection, com i an angular opening Q4 in the cylinder gage with the cylinder, or any other I, as maybe preferred. The cap is pre ti angeable and the parts more easily asessi AviLaeie coe'4 3. In a device for tightening springs, the combination ot' a coil-spring, means on one end of the spring for engaging with the springadjuster on a curtain-roller or similar device, means on the other end of the said spring for turning the same, means for determining the relative revolutions of the end of the spring and a spindle iii said spring.

4. In a device for tightening springs, the combination ot' a coil-spring, means connected with one of the ends thereofl adapted to engage tlie spring-adjuster on a curtain-roller or similar device, means for revolving the opposite end of said spring, a spindle connecting the means on the ends of said spring, and means for determining the relative revolutions oi' the ends of the spring.

In a device for tightening springs, the

combination ot' a spring, a casing, means on l rdinary brace combined with my inone end of the spring for engaging the springadjuster in a curtain-roller or the like, means on the other end Qi' the said spring Jfor revolving the saine, and means for determining the relative torsional stresses of said spring.

6. In a device for tightening springs, the combination oi' a casing, a spindle, a spring within the casing, one end of said spring being adapted to revolve with the spindle and casing and means connected with the other end of said spring, adapted to engage with the spring-tiglitening means, on a curtain-roller or similar article.

7. In a tension-regulating device, the combination of a casing, a spindle within the casing, a spring surrounding said spindle, one end of the spring engaging with said spindle and means connected with the opposite end of the spring adapted to engage with the springadjuster on a curtain-roller or similar article.

8. In a tension-regulating device, the coinbination of a casing, a spindle within the casing, a spring within the casing engaging with the spindle, a cylinder revolving partly within the casing, said cylinder engaging with the opposite end of said spring and means connected with said cylinder for engaging with the spring-adjuster on curtain-rollers or the like.

9. In aspring-adjuster, a casing, a spindle within the casing, a spring within thecasing, one end of which engages with the spindle, a cylinder adapted to revolve and means on the cylinder engaging the opposite end of said spring and means connecting the spindle and cylinder.

l0. In a spring-tightening device, a casing, a spring Within the casing, one end of said spring being secured to move with said casing, a cylinder adapted to revolve and means connecting the cylinder with the opposite end of said spring and means connected with said cylinder for engaging with thespring device tor curtain-rollers and the like.

11. In a spring-tension-tightening device, the combination of a casing, a spindle, a spring within the casing, one end of said spring be- IOO ISO

ing engaged so as to move With said casing, and a cylinder connected with the opposite end of said spring and adapted to revolve, means connecting said cylinder, and casing, said cylinder being adapted to register with said casing.

12. ln a spring-tension-tightening device, the combination of a casing, a spindle, a spring within the casing, one end of which is engaged so as to move with said casing, a cylinder connected with the opposite end of said spring, and adapted to' revolve, a cross-piece Within the said cylinder and means securing said cross-piece and spindle, together, so that said cylinder may revolve.

'13. 1n a spring-tightening device, the combination of a casing, a spindle Wit'hin'the casing, an outer end to said spindle,'a spring Within the casing, one end of which engages with said spindle, the cylinder revolving partly within the said casing, means connecting the cylinder and other end of said spring, means connecting the cylinder and spindle, anda cap on the cylinder having an angular opening in the end -adapted to engage with the spring- -tightening device in a curtain-roller or similar article.

14. In a spring-tightening device, the combination of a casing, a spring within the casing, a revolving cylinder, and means on the cylinder to engage with the spring-tightener of a curtain-roller,saidcylinder being adapted to revolve, and means whereby when said casing and cylinder are revolved, a torsional stress ofsaid casing is caused to act on the said curtain-roller spring, and means for determining BEST VAlLBLE COF" a l the relative revolutions of the said cylinder and casing.

15. In a spring-tighteningV device, the cornbination of a casing, a spindle having a free end adapted to fita brace or similar device, said spindle extending Within the casing, a spring, one end of which engages said spindle, a cylinder partly within said casing, a crosspiece in the cylinder engaging with the opposite end of said spring, a screw in the end of said spindle to secure the cross-piece and spindle, and a cap on the cylinder having an angular opening to engage a curtain rollerspring adjuster.

16. In a spring-tightening device, the combination of a casing, a spring Within the casing, means for engaging one end of the spring with the casing, a cylinder extending in the casing, a flange on the cylinder abutting against the end of the casing, and provided with means for registering with the casing, a cross-piece in the cylinder engaging with one end of the said spring, means securing the casing and a cylinder together, so as to allow the same to revolve, and a'cap in the cylinder having yan opening adapted to engage with the spring-tightening means on a curtain-roller or similar article.

Signed inthe city and county of Philadelphia, State of Pennsylvania, this 28th day of February, 19011.

yEZRA s. BUCKNAM.

Witnesses:

WM. J. FERDINAND, TERRENGE MCGUSKER. 

